Pulverizing-machine



No. 620,655. Patented Mar. 7, I899. H. c. nurcnmson.

PULVERIZING MACHINE.

(Application filed Mar. 18, 1898.) (No Model.) 2 Sheets-Sheet I.

Witness? 3Q Patented Mar. 7, I899.

H. C. HUTCHINSON.

PULVERIZING MACHINE.

(Apphcatmn filed In 18, 1898) (No Modal.)

Wihwaaao gfiwm HARLEY C. HUTCHINSON,

PATENT CFFICE.

OF CAMERON, MISSOURI.

PU LVERIZING-MACHINE.

SPECIFICATION forming part of Letters Patent No. 620,655, dated March 7, 1899.

Application filed March 18, 189 8- To all whom it may concern:

Be it known that I,HARLEY O. HUTCHINSON, a citizen of the United States, residing at Cameron, in the county of Clinton and State of Missouri, have invented certain new and useful Improvements in Pulverizing-Machines;

and I do hereby declare the following to be a full, clear, and exact description of the invention, such as will enable others skilled in the art to which it appertains to make and use the same.

My invention relates to barrows; and its object is to provide an improved construction of the same whereby clods may be broken and pulverized in the ground and leveled in an efficient manner.

The invention consists in the novel construction and combination of parts hereinafter fully described and claimed.

In the accompanying drawings, Figure 1 is a plan View of a harrow constructed in accordance with my invention. Fig. 2 is a longitudinal sectional view. Fig. 3 is a detail view, on an enlarged scale, of one of the teeth. Fig. 4 is a detail view of the drag-bar.

In the said drawings the reference-numeral 1 designates a frame comprising side bars 2 and end bars 3. Journaled in brackets secured to said bars are two transverse oscillatory shafts 4, one of which is provided with a crank-lever 5, pivotally connected with which is a horizontal bar 6, the front end of which is pivoted to an arm on the front shaft 4. Connected with said bar 6 is a segmentplate 7, having notches 8 therein with which is adapted to engage a pawl 9, working in a guide 10, secured to said lever. This pawl is connected by a rod 12 to a small lever 13, pivoted to the crank-lever. By operating the crank-lever the connections thereof will turn the shafts 4: to elevate or lower the teeth, hereinafter described. When the pawl is engaged with one of the notches of the segmentplate, the shafts are locked and prevented from turning. Secured to said shafts are a number of clod-cutting-teeth knives let, each consisting of a rectangular bar of metal bent at one end, so as to form a cutter 14:, and a curved portion 15, which latter extends partly around the shaft and is secured thereto bya bolt 16 and nut 17 An additional strengthen- Serial No. 674,405. (No model.)

ing-plate 18 may be secured to said knife, if desired. Secured to said side bars 2, near the rear end, is a stationary shaft 19, to which are pivoted two or more drag-bars 20, which are inclined at an angle and provided with reversible metal plates on the inner sides. Secured to said drag-bars are brackets 21, with which are connected upwardly-extending rods 23, which project through the rear end bar 3 of the frame. Interposed between said end bar and the drag-bars are coiled springs '24.

The numeral 25 designates removable and replaceable washers on the ends of the rods 23, held in place by pins 26. By means of these washers the inclination or angle of saiddrag-bars can be adjusted so as to regulate the depth they are to run, according to the condition of the soil.

The numeral 27 designates a longitudinal bar to which is secured a seat-support 28, provided with a seat 29. r

. It will be seen that the knives are of different planes, so that as the machine is drawn over the ground said knives will engage with and cut the clods. The drag-bars following the knives will pulverize and smooth the soil. When the metal plates of the drag-bars become worn, they may be reversed, so as to present a new surface to the ground. It will be noted that the knives are alternately so curved or twisted that one half of them turn or throw the dirt in one direction and the other half throw it in the opposite direction.

Having thus fully described my invention, what I claim is- 1. In a harrow, the combination with the supporting-frame, of the oscillatory shafts carrying knives, a lever for operating said shafts, a fixed shaft in rear of the oscillatory shafts, drag-bars pivotally secured to said fixed shaft, brackets secured to the rear side of each of said drag-bars, rods secured at their lower ends to said brackets, a cross-bar through which the upper ends of said rods extend, springs arranged on said rods, and means for adjusting the rods to vary the inclination of the drag-bars.

2. In a harrow, the combination with the frame, the oscillatory shafts, the knives secured thereto, and means for oscillating said shafts, of the drag-bars, the transverse shaft to which they are pivoted, the reversible metal In testimony whereof I affix my signature plates secured to said drag-bars, the brackets in presence of two Witnesses. a so secured thereto, the rods connected with 7 said brackets and extending through the rear HARLEY HUTCHINSON' 5 end of the frame, the coiled springs and the Witnesses:

removable and replaceable washers, substan- THOS. E. TURNEY, tially as described. WESLEY B. CALDER. 

